Hydrogenation catalyst as well as preparation method and application thereof

By coating the surface of the molecular sieve with a metal oxide layer and controlling the particle size using ALD technology, the problem of uneven distribution of metal particles on the molecular sieve was solved, thereby improving the stability of the catalyst and the selectivity and yield of the cinnamaldehyde hydrogenation reaction.

CN120827906APending Publication Date: 2025-10-24CHINA PETROLEUM & CHEMICAL CORP +1
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Patent Information

Application Number
CN202410486438.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-04-22
Publication Date
2025-10-24

AI Technical Summary

Technical Problem

In existing technologies, the interaction between molecular sieves and metals is relatively weak, resulting in uneven distribution of metal nanoparticles, which easily lead to agglomeration and affect the stability of the catalyst and the selectivity of cinnamaldehyde in selective hydrogenation reactions.

Method used

By coating the surface of a molecular sieve with a metal oxide layer of a specific thickness and using atomic layer deposition (ALD) technology to precisely control the particle size of the metal oxide layer and the active metal particles, the stability and dispersibility of the metal on the molecular sieve are improved, thus preparing a hydrogenation catalyst with small particle size and high dispersibility.

Benefits of technology

The selectivity and yield of cinnamyl alcohol in the hydrogenation reaction of cinnamaldehyde were improved, and the selectivity of cinnamaldehyde was not less than 40% under suitable conditions.

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Abstract

The invention discloses a hydrogenation catalyst as well as a preparation method and application thereof. The hydrogenation catalyst comprises a molecular sieve coated with a metal oxide layer and active metal loaded on the metal oxide layer; the metal oxide layer is selected from at least one of titanium oxide, zinc oxide, zirconium oxide or niobium oxide, and the active metal is selected from at least one of Pt, Pd, Ru, Ir or Ni. The catalyst provided by the invention is used in cinnamyl aldehyde hydrogenation reaction, and has good cinnamyl aldehyde conversion rate and cinnamyl alcohol selectivity.
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Citation Information

Patent Citations

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    CN103801378B

  • Yolk-shell type structure material taking zeolite molecular sieve as core and mesoporous layer as shell, and preparation method of yolk-shell type structure material

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  • Platinum-iron bimetallic catalysts supported on hierarchical porous molecular sieves, their preparation and application

    CN109046442B

  • Preparation method of Pt supported molecular sieve catalyst for cinnamyl aldehyde hydrogenation reaction

    CN113210008A

Cited By

  • Catalyst for preparing cinnamyl alcohol through selective hydrogenation of cinnamyl aldehyde as well as preparation method and application of catalyst

    CN122076432A